I have a computer (Debian 7.2 Wheezy GNU/Linux) with two HDMI outputs. I use one of them to address the monitor, another one to address my 5.1 audio receiver.
Now, as the receiver does not have a monitor, I want to send only the audio signal through this HDMI. The problem is, when I disable the receiver video signal in the display settings, the sound gets disabled also. It is selected in PulseAudio, but the receiver does not receive a signal.
When I enable the monitor, everything works well.